Use radio name for pulse dev description

audio-linux.go

@@ -112,14 +112,14 @@ func (a *audioStruct) loop() {
 	}
 }
 
-func (a *audioStruct) init() {
+func (a *audioStruct) init(devName string) {
 	a.source.Name = "kappanhang"
 	a.source.Filename = "/tmp/kappanhang.source"
 	a.source.Rate = 48000
 	a.source.Format = "s16le"
 	a.source.Channels = 1
 	a.source.SetProperty("device.buffering.buffer_size", (48000*16)/10) // 100 ms
-	a.source.SetProperty("device.description", "kappanhang input")
+	a.source.SetProperty("device.description", "kappanhang: "+devName)
 
 	a.sink.Name = "kappanhang"
 	a.sink.Filename = "/tmp/kappanhang.sink"
@@ -127,7 +127,7 @@ func (a *audioStruct) init() {
 	a.sink.Format = "s16le"
 	a.sink.Channels = 1
 	a.sink.SetProperty("device.buffering.buffer_size", (48000*16)/10)
-	a.sink.SetProperty("device.description", "kappanhang output")
+	a.sink.SetProperty("device.description", "kappanhang: "+devName)
 
 	if err := a.source.Open(); err != nil {
 		exit(err)

audiostream.go

@@ -119,12 +119,14 @@ func (s *audioStream) init() {
 	s.rxSeqBuf.init(rxSeqBufLength, 0xffff, 0, s.rxSeqBufEntryChan)
 }
 
-func (s *audioStream) start() {
+func (s *audioStream) start(devName string) {
 	s.common.sendPkt3()
 	s.common.waitForPkt4Answer()
 	s.common.sendPkt6()
 	s.common.waitForPkt6Answer()
 
+	audio.init(devName)
+
 	log.Print("stream started")
 
 	s.timeoutTimer = time.NewTimer(audioTimeoutDuration)

controlstream.go

@@ -5,6 +5,7 @@ import (
 	"crypto/rand"
 	"encoding/binary"
 	"errors"
+	"strings"
 	"time"
 
 	"github.com/nonoo/kappanhang/log"
@@ -150,6 +151,14 @@ func (s *controlStream) sendRequestSerialAndAudio() {
 	})
 }
 
+func (s *controlStream) parseNullTerminatedString(d []byte) (res string) {
+	nullIndex := strings.Index(string(d), "\x00")
+	if nullIndex > 0 {
+		res = string(d[:nullIndex])
+	}
+	return
+}
+
 func (s *controlStream) handleRead(r []byte) {
 	switch len(r) {
 	case 16:
@@ -200,13 +209,14 @@ func (s *controlStream) handleRead(r []byte) {
 			// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			// 0x00, 0x00, 0x00, 0x00, 0xc0, 0xa8, 0x03, 0x03,
 			// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
-			log.Print("serial and audio request success")
+			devName := s.parseNullTerminatedString(r[64:])
+			log.Print("serial and audio request success, device name: ", devName)
 			if s.requestSerialAndAudioTimeout != nil {
 				s.requestSerialAndAudioTimeout.Stop()
 				s.requestSerialAndAudioTimeout = nil
 			}
 			go streams.serial.start()
-			go streams.audio.start()
+			go streams.audio.start(devName)
 			s.serialAndAudioStreamOpened = true
 		}
 	}

main.go

@@ -48,7 +48,6 @@ func main() {
 	parseArgs()
 
 	serialPort.init()
-	audio.init()
 	streams.audio.init()
 	streams.serial.init()
 	streams.control.init()